Build， repair， or expand your drip irrigation system with the Smart Loc Universal Coupling， the unique fitting that accommodates multiple tubing sizes. Works with 1/2 in.， 5/8 in.， and 0.710 in. supply tubing and dripline sizes to connect sections together or transition from one tubing size to another. Make easy connections with a twist-simply insert the barbed end into the tube， then twist the nut over the tubing end for a secure fit. Reusable fitting is made of acrylonitrile butadiene styrene (ABS).Find the COUPLING STRETCH N LOCK at Ace.